Can Radix Rehmanniae Praeparata and Radix Angelicae Sinensis be brewed together?

Cooked huang angelica astragalus can be brewed together to drink, but it is not recommended to drink in water, the efficacy of drinking in water is very small, not a substitute for traditional Chinese medicine soup or proprietary Chinese medicine.
1. cooked rhubarb: it has the effect of nourishing yin and tonifying blood, tonifying the liver and kidneys, benefiting the essence and filling the marrow, and can treat palpitations, dazed and confused (heartbeat is violent, panic and restlessness), night sweats (sweating abnormally after falling asleep, and sweating stops after waking up), hot flashes, vertigo, and other illnesses.
The adverse effects of this medicine are still unclear; avoid using it for people with loose stools (thin and unformed feces); avoid using it for people with dampness (stomach distension and discomfort); avoid eating fatty, sweet and thick-flavored things during the period of using the medicine.
2. Angelica sinensis: it has the effect of regulating menstruation, tonifying blood, activating blood circulation and relieving pain, and can treat dizziness, palpitation, dysmenorrhea, abdominal pain and other diseases. The adverse effects of this drug are not clear; it is contraindicated for people with dampness and fullness; it is contraindicated for people with loose stools; it is recommended to have a light diet during the use of this drug.
3. Astragalus: It is good for Wei and consolidating the surface, strengthening the spleen and diuretic, benefiting qi and generating fluids (by replenishing qi to promote the production of fluids), etc. It can treat prolonged diarrhea, prolapse of the anus, loss of appetite, coughing and wheezing, and self-sweating (involuntary sweating during the daytime, and sweating aggravated by a little movement), etc. The adverse effects of this medicine are still unclear.
The adverse effects of this drug are still unclear; it is contraindicated in cases of yin deficiency and hyperactivity of yang; it is recommended to avoid overeating during the period of administration.
There is no contraindication between the above three medicines, so they can be brewed together, but the correct way to use the three medicines is to decoct them in water, soaking in water may not precipitate the active ingredients in the medicines sufficiently, thus reducing the efficacy, so it is not recommended to drink in water.
If you need to use the above drugs to treat the disease, should be identified by a Chinese medicine practitioner and then used correctly, do not mix their own medication.